Asking Price Drivers
Which apartment features correlate with higher/lower asking prices · Based on 65 listings
This page analyzes 65 apartment listings in Kallio to identify which features are associated with higher or lower asking prices per square meter. Three complementary methods are used: direct median comparisons for yes/no features, rank correlations for numeric features, and a Ridge regression model that estimates each feature's independent contribution while controlling for the others.
The clearest price signals come from upcoming renovation liabilities. Pipe Reno — Upcoming (-923 EUR/m2), Entrance Hall (-892 EUR/m2), Courtyard View (-654 EUR/m2) show statistically significant discounts -- their 95% confidence intervals are entirely below zero. This makes intuitive sense: upcoming major works signal future costs for the buyer. Among numeric features, Condition Score has the strongest correlation with price (Spearman r=0.45, p<0.001). The Ridge model confirms this: condition and floor number are the only features whose effects remain significant after controlling for everything else.
Most features show wide confidence intervals -- with 65 listings, many effects are suggestive but not yet conclusive. Faded bars and faded table rows indicate where the CI crosses zero. As the dataset grows (~30 new listings/month), these estimates will tighten.
Ridge Model Effects (approx % per 1 SD)
Ridge regression on log(EUR/m2), alpha=1.0 · R2 = 0.414 · N = 55 · Faded rows: CI crosses zero
| Feature | Effect | 95% CI |
|---|---|---|
| Condition Score | ▲ +4.9% | [+1.5, +8.1] |
| Pipe Reno — Upcoming | ▼ -3.2% | [-5.3, -0.4] |
| Facade Reno — Done | ▼ -3.1% | [-6.5, +0.6] |
| Floor Number | ▲ +3.1% | [+0.7, +5.7] |
| Building Age (years) | ▲ +1.9% | [-1.3, +4.3] |
| Pipe Reno — Done | ▲ +1.5% | [-1.7, +4.5] |
| Bathroom Reno — Done | ▼ -1.4% | [-4.1, +1.9] |
| Elevator | ▲ +1.3% | [-0.7, +2.9] |
| Size (m²) | ▲ +1.2% | [-1.7, +4.2] |
| Facade Reno — Upcoming | ▼ -0.9% | [-3.8, +1.8] |
| Roof Reno — Upcoming | ▲ +0.9% | [-1.9, +3.1] |
| Maintenance Fee (EUR/mo) | ▼ -0.8% | [-3.4, +1.9] |
| Bathroom Reno — Upcoming | ▼ -0.7% | [-2.9, +1.6] |
| Original Condition (keyword) | ▲ +0.6% | [-2.4, +3.5] |
| Roof Reno — Done | — +0.5% | [-1.9, +2.8] |
| Building Sauna (shared) | — +0.3% | [-3.0, +2.8] |
| Balcony | — +0.1% | [-2.9, +2.3] |
| Renovated (keyword) | — +0.1% | [-3.2, +2.5] |
| Kitchen Reno — Done | — +0.0% | [-3.8, +3.0] |
Coefficients show approximate % change in EUR/m2 per 1 standard deviation change in each feature. Based on 55 listings with complete data. Bootstrap 500x for CIs. Sample size is growing ~30/month.